There is a saying that I like very much, "the direction of historical development has long been engraved on everyone with capital letters", which probably means this. History is still the history of mankind. In addition to the economic foundation and superstructure, it is more important to be brave and strong, wandering and yearning for human nature. Many times, you can cross the Millennium and face the ancients directly through this yellowed page. Such a touch is the greatest pleasure for many people to learn history. When we study history, we study people themselves. History is not a boring text piled up with data symbols and technical terms, where there are the joys and sorrows, love and hate of our ancestors. The most important humanistic concern in history is to look at people, flesh-and-blood people, living people, not just historical tools or a screw. Ignoring the existence of human beings will be the greatest sorrow in history.